Electric heater for the rollers of metal-rolling machines



April 20; 1926. v

' J. P. MAGUIRE v ELECTRIC HEATER FOR THE ROLLERS OF METAL ROLLINGMACHINES Filed Jan. 22, 1925 Patented Apr. 20, 1926.

UNITED 'VSTATEVST.

JOHN P. MAGUIRE,"OF MART'INs FERRY, OHIO. I

PATENT" OFFICE.

- ELECTRIC HEATER FOR THE ROLLERS or METAL-ROLLING MACHINES.

Application filed January 22, 1925. 7 Serial No. 4,039.

To all whom it may concern:

Be it known that I, JOHN P MAGUIRE, citizenofthe United States, residingat Mar.

' tins Ferry, in the county of Belmont and,

means for heating thecoacting oppositely rotating rollers of ametalrolling machine without interfering with the usual operation ofthe'roller. 7

One. of the important objects .of the present invention is to provide anelectric heater which is adapted to be used in conjunction with each ofthe rollers, means being associated withthe heater for holding the same7 in yieldable' engagement with the respective rollers.

I A further object is to provide a device of the above mentionedcharacter, wherein the rollers may be heated uniformly, furthermoresaving considerable timeand labor in heating the rollers. so that thesame may properly function in their operation. The

provision of an electric heater of the above mentioned character willfurthermoreprevent the roller becoming cracked as often results from themanner in which the rollers of a metal rolling machine are now generallyOther objects and advantages of thisinventionv will become apparentduring the course of the following description.

In the accompanying drawings forming part of this specification and inwhich like numerals designate like parts throughout the same Figure 1 isa side elevation of the frame and the coacting rollers supported thereinknown in the art.

of a metal rolling machine showing my in vention associated therewith,and Fig. 2 is a sectional view through the heater and a portion of oneof the rollers.

In the drawing wherein for the purpose of illustration is shown thepreferred embodiment of my invention, the'numerals 1 and a 2 designatethe spaced vertical standards of the roller supporting frame of anyconventional type of metal rolling machine, the coacting rollers whichare mounted at their respective ends in the standards 1 and 2 beingillustrated at3 and 4 respectively.

The rollersare adapted for frictional en' gagement with each other androtate in the opposite directions in the manner well The lower roller 3is mounted to be driven by the drive shaft 5 in the usual manner. 1

My improved electric heater comprises an elongated casing 6,the innerface of which is curved as illustrated at 7 to conform with theconfiguration of each of the rollers. Suitable anti-friction rollers 8are associated with the curved face 7 of the casing 6 and engage therotatable rollers in such a manner as to space the heater from thelatter. An electric heating unit designated generally by the numeral 9of any suitable construction is disposed within the casing 7 and isinsulated therefrom by the insulation 10. The heating unit is adapted toextend for substan-' tially the full length of the casing and isdisposed adjacent the curved inner face 7 in a manner clearlyillustrated in Fig. 2.

An electric heater is provided for each of the rotatable rollers, one ofthe heaters being disposed on one side of the frame for cooperation withthe lower roller 3 while the other heater is disposed on the oppositeside of the frame for cooperation with the upper roller 4. This is moreclearly illustrated in Fig. 1.

k A yieldable support is provided for each heater and to this end, thereis provided a pair of coiled springs 11 and 12 respectively at each endof the casing of each heater. The inner ends of the cross springs arefastened to the ends of the casings while the opposite ends ofthesprings are detachably secured to the standard of the roller supportingframe.

In rolling mills, when steel bars are laced between the rollers, the toproller is orced upwardly between the vertical standards of the rollersupporting frame depending upon the thickness of the bar which is placedbetween the rollers and at a distance which the lower end of therotatable screws associated with the standards of the frame are locatedwith respect to the ends of the upper rollers. At the same time, the toproller is forced rearwardly and when the bar passes between the rollers,the top roller will drop down again and come in contact with the bottomroller and simultaneously rebound forward for a slight distance. Thus byyieldably supporting the electric heaters, the various movements of theupper rollers will not effect the displacement of the electric heaterand cause the same to be broken off as would occur if the electricheater was not supported by the springs 11 due to the action of therollers. Also the bottom roller will frequently cause the standards tospread apart and as rolling conditions change, the standards are drawntogether or separated so that the provision of the coiled springs forthe supporting of the lower electric heater will permit the adjustmentof the standards without affecting the bottom electric heater.

The arrangement of'the electric heater on the opposite sides of theframe enables the rotatable rollers 3 and 4- to be heated during theoperation of the metal rolling machine and furthermore the rotatablerollers will be heated uniformly. After the proper degree of heat hasbeen reach d, the current to the heating units in the heaters suppliedby the wiring 13 may be cut off. The provision of a device of the abovementioned character, will save considerable time and labor as well asexpense and will at all times be positive and efficient in carrying outthe purposes for which the same is designed.

While I have shown the preferred embodiment of my invention, it is to beunderstood that various changes in the size, shape and arrangement ofparts may be resorted to without departing from the spirit of theinvention and the scope of the appended claims.

Having thus described my invention, what I claim as new is 1. Incombination with a metal rolling machine including the coactingoppositely rotating rollers, and the supporting frame there-for, of anelectric heater for heating each of said rollers during the operationthereof, and means for yieldably supporting the heaters in engagementwith the respective rollers.

2. In combination with a metal rolling machine including the coactingoppositely rotating rollers, and the supporting frame therefor, of anelectric heater for heating each of said rollers during the operationthereof, means for yieldably supporting the heaters in engagement withthe respective rollers, said means comprising a pair of coiled springssecured .at one end to each end of the heater, the opposite ends of thecoiled springs being secured to the adjacent portions of the frame.

3. In combination with a :metal rolling machine including the coactingoppositely rotating rollers, and the usual supporting standardstherefor, of an electric heater for each of said rollers, the samecomprising an elongated casing, the inner face thereof being curved,anti-friction rollers .carried by the inner curved face of the casingand engaging the respective rollers, and aheating unit arranged in thecasing adjacent the curved inner face thereof and insulated therefrom.

4:. In combination with a metal rolling machine including the coactingoppositely rotating rollers, and the usual supporting standardstherefor, of an electric heater for each of said rollers, the samecomprising an elongated casing, the inner face thereof being curved,anti-friction rollers carried :by the inner curved face of the casingand en gaging the respective rollers, and a heating unit arranged in thecasing adjacent the curved inner face thereof and insulated therefrom,and coiled springs secured at one end to the outer end of the casing,the opposite ends of said springs being secured-to the ad jacentstandards.

5. In combination with a metal rolling machine including the coactingoppositely rotating rollers, and the usual supporting standardstherefor, of an elastic heater for each of said rollers, the samecomprising an elongated casing, the inner face thereof :being curved,anti-friction rollers carried by the inner curved face of the casing andengaging the respective .rollers, a heating-unit arranged in thecasingadjacent the curved inner face thereof and insulated therefrom,coiled springs secured at one end'to'the outer end of the casing, theopposite ends of said springs being secured1tothe adj acentstandards,one of said heaters being/disposed on one side of the frame forcooperation with one roller, another heater being disposed on theopposite side of the frame for cooperation with the coacting roller.

In testimony whereof Laffixmyisign'ature.

JOHN :P. MAGUIRE.

